IMAGE: The Rama yantra is an instrument used to find the altitude and the direction of celestial objects from the sun. IMAGE: The Laghu Samrat yantra helps measure time based on the shadow cast by ...

'Samrat Yantra', which is the largest equinoctial sun dial in the world, is used to ascertain the direction of the winds to make an estimate of the rainfall.

The “Karka Rashi Yantra” consists of an inverted D arch, marking 180 degrees, and a rod-like structure at the top, which acts as a needle and whose shadow helps with calculations.

It’s a given that architects work in three dimensions. Christian Wassmann, however, prefers to think—and work—in five. “The first three dimensions of architecture are, of course, the X, Y ...

The Samrat Yantra is an enormous sundial: a 27m-high triangular wall with two semi-circular ramps that radiate like wings from its sides (Credit: MarcelloGoggio/Getty Images) ...

Built in the early 1730s under the direction of the Rajput king, Sawal Jai Singh II, the Samrat Yantra, also known as the 'Supreme Instrument', measures time to an accuracy never previously achieved, ...

Some of its 16 geometric devices, including the Samrat Yantra - world's largest sundial that tells time of day to an accuracy of two seconds, have developed cracks for want of proper maintenance ...

At the Jantar Mantar, the 18th-century observatory in Jaipur that looks like an astrologer’s adventure playground, Indian visitors ignored their smartphones to consult Samrat Yantra, the 27 ...

This observatory built in 1710 A.D., is also famous for its unofficially designated status as the site for almost all protests in the capital, the recent one being Anna Hazare's five-day fast.